Document Detail


Sperm whale behaviour indicates the use of echolocation click buzzes "creaks" in prey capture.
MedLine Citation:
PMID:  15539349     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During foraging dives, sperm whales (Physeter macrocephalus) produce long series of regular clicks at 0.5-2 s intervals interspersed with rapid-click buzzes called "creaks". Sound, depth and orientation recording Dtags were attached to 23 whales in the Ligurian Sea and Gulf of Mexico to test whether the behaviour of diving sperm whales supports the hypothesis that creaks are produced during prey capture. Sperm whales spent most of their bottom time within one or two depth bands, apparently feeding in vertically stratified prey layers. Creak rates were highest during the bottom phase: 99.8% of creaks were produced in the deepest 50% of dives, 57% in the deepest 15% of dives. Whales swam actively during the bottom phase, producing a mean of 12.5 depth inflections per dive. A mean of 32% of creaks produced during the bottom phase occurred within 10 s of an inflection (13x more than chance). Sperm whales actively altered their body orientation throughout the bottom phase with significantly increased rates of change during creaks, reflecting increased manoeuvring. Sperm whales increased their bottom foraging time when creak rates were higher. These results all strongly support the hypothesis that creaks are an echolocation signal adapted for foraging, analogous to terminal buzzes in taxonomically diverse echolocating species.
Authors:
Patrick J O Miller; Mark P Johnson; Peter L Tyack
Related Documents :
20111079 - The usefulness and significance of assessing rapidly progressive spermatozoa.
15838839 - An electro-optic monitor of the behavior of chlamydomonas reinhardtii cilia.
18998229 - Structural abnormalities of common carp cyprinus carpio spermatozoa.
22465929 - Establishment of the background color to make discrimination between the domestic ethic...
2582499 - External mechanical control of the timing of bend initiation in sea urchin sperm flagella.
22330369 - Feature binding of a continuously changing object.
8968969 - Visual influence on head shaking using the vestibular autorotation test.
20590239 - Spectroscopic interpretation and velocimetry analysis of fluctuations in a cylindrical ...
25274219 - Establishment of background color to discriminate among tablets: sharper and more feasi...
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  271     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2004-11-12     Completed Date:  2005-01-25     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2239-47     Citation Subset:  IM    
Affiliation:
NERC Sea Mammal Research Unit, School of Biology, University of St Andrews, St Andrews KY16 9QQ, UK. pm29@st-andrews.ac.uk
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Acoustics
Analysis of Variance
Animal Communication*
Animals
Diving*
Echolocation / physiology*
Gait / physiology
Predatory Behavior / physiology*
Sound Spectrography
Whales / physiology*
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Predators select against high growth rates and risk-taking behaviour in domestic trout populations.
Next Document:  Sexual selection, natural selection and the evolution of dimorphic coloration and ornamentation in a...